Boiler.



No. 737,095. PATBNTED AUG. 25, 1908.

L. GRENTHE. I

BOILER.

APPLICATION FILED DEC. 1. 1902.

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No. 737,095. v PATENTED AUG. 25, 1903..

L. GRBNTHB.

BOILER. I

APPLICATION FILED DEG. I 1902.

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- lave/ 770114 mg lames J 77; @4 Ye/d UNITE STATES Patented August 25, 1903.

LOUIS GRENTHE, OF PONTOISE, FRANCE.

BOILER.

SPECIFICATION forming part of Letters Patent N o. 737,095, dated August 25, 1903. 'Application filed December 1, 1902.; Serial No. 133,462. (No modem all whom it may concern:

Beit known that I, LOUIS GRENTHE, engineer, a citizen of the Republic of France, re-

siding at Pontoise, Seine-et-Oise, in the Re-' public of France, have invented certain new and useful Improvements in Boilers, of which the following is a specification.

This invention relates to improvements in boilers of the kind comprising an upper cylindrical body, one or more lower boilers, and

tubes or communications between these members. boiler two distinct and simultaneous circulations which are very active and of thus obtaining a great amount of 'steam the invention consists in arranging within the said upper body partitions which separate two compartments, both of which are in communica-' into the rear parts of the said compartments By this means the upward" located above. currents of water mixed with steam issuing from the tubes of both the forward groups or those heated to a greater extent are separated by the partitions and do not come together in the upper body part. given off by each circulation escapes through the respective compartment and does not interfere in any way with the other circulation. The water then returns to the boilers through the tubes heated to a less extent or those 10- cated in the rear. I

In the accompanyingdrawingsIliave shown in diagrams several forms inwhich the main features of my invention may be carried out.

Figures 1 to 12, inclusive, are alternately longitudinal and transverse vertical sections of six boilers of slightly different constructions. i

In Figs; 1 and 2 the boiler comprises an up- For the purpose of establishing in the On the other hand;

The steam" per cylindrical body a, a boiler b, and tubes 0 (1 cf, connecting the body a with the boiler 12. In the body a are arranged the partitions g h i, which form two compartments j and k,

communicating with the steam-chamberv m above. The partition 9 is in the form of a trough open at its ends and placed longitudinally in the body a at a certain distance from the bottom. Each partition horiis in the form of a crown-segment and closes the interval between the outer edge of the end of the trough and theinner wall'of the body a. At the bottom of the front parts of the compartments j and it open the tubes 0 and d, located the one behind the other and receiving the direct action of the furnace 'n. The rear tubes eandf open upward into the rear parts of the compartments j and It. The mixture of water and steam formed in the tube 0 rises in the compartment j and gives off its steam into the chamber 1%, and then the water passes over partition gand down through the tubefinto the boiler 11 to move upward again in the tubes 0 and d. On the other hand, the mixture of water and steam formed in the tube d rises in the compartment 70, gives off its steam on each side of the partition 9 in the chamber m, and then the water passes under the partitiongand moves downward through the tube 6 into the boiler 17. r v In the forms of carrying out my invention shown in Figs. 3 to 12 the parts which are similar to"'those hereinbefore described are designated, by the same letters of reference.

In Figs. 3 and 4 the boiler comprises an upper body ct, a boiler b, tubesc d ef,connecting the body a with the boiler, and partitions g and h, located in the body a. The partition g is in theform of a trough open at its ends, and the partition It consists in a crownsegment fitting between the forward end of the trough g and the Wall of the body a. The rear end of the trough g extendsback ward tothe rear bottom of the'bo'dy (1.: Into thecompartmentj,formed in front of and above the partitionsh and g, open the front tube 0 and the real-tube 'f'. Into the compartment k,located under the partition g,open the front tube d and the rear tube 6. The

operation of this boiler is the same as that hereinbefore described. In Figs. 5 and 6 the boileris provided with two boiler parts b, connected with the body a by tubes 0 d e'f. The tubes 0 extend upward to within the body a, while the tubes 6' f extend downward to within the boiler parts b, the tubes f extending lower down than the tubes 6. In the body a are located the partitions g h t', similar to those hereinbefore described and forming the compartmentsj and 70. The tubes 0 and j" open, respectively, into the front and rear parts of the compartmentj. The tubes d and 6 open into the front and rear parts of the compartment 70. The operation is still the same as that hereinbefore described,the water of the tubes 0' rising into the compartmentj and then returning to the boiler parts through the tubes f, while the water in the tubes at rises into the compartment 713 and moves down again through the tubes e into the boiler parts. The extension of the tubes 0' e f farther up or down serves to increase the height of the forward and rear columns of water, the different weights of which determine the circulation of the water.

In the boiler shown in Figs. 7 and 8 the body a and the boiler part b have flat-shaped parts a I), turned one toward the other to receive several parallel rows of tubes cl, and the tubes 0 and f, located in front and rear, are extended farther up and down, respectively. Within the tubes (Z are located narrow tubes 6 each extending upward and downward to within the body a and the boiler part b. Partitionsg h 2', similar to those hereinbefore described, are located in the body a and form compartmentsj and 70, into which open, respectively, the tubes 0 and f, on the one hand, and the tubes at and 6 on the other hand. The operation is the same as that hereinbefore described. The water of the tubes 0 and d, heated to a greater extent, rises into the body a, passes both over and under the partition g, and moves down again into the boiler part I) through the tubes f and c heated to a less extent.

Instead of locating within the tubes d the return-tubes of the compartment the return-tubes of the compartmentj may be located there, as shown in Figs. 9 and 10. In this case the body a and the boiler partb are connected by tubes c, d, and e, and within the tubes (1' are located the narrow tubes f extended farther upward and downward than the said tubes at. \Vithin the body a are located a partition g in the shape of a trough, and partitions h and 1" closing the ends of the said trough. The tubes 0 and f open in to the trough through the partition g whereas the tubes d and 6 open into the bottom of the body a. As in the previous cases, the water of tube 0' rises into the compartmentj, passes over the partition 9 and moves down again into the boilerpart through the tubes f whereas the water of tubes d rises into the compartment 70, passes under thepartition giand moves down again through the tube 6' into the boiler part.

In the form shown in Figs. 11 and 12 the body a and the boiler part b are connected at their ends only by tubes 0 and e, and the tubes 01 which lie between the same, open only into the body a, while their lower end is closed. A partition in the form of a trough is located in the body a, and its ends are closed by partitions h and i. Into the bottom of the partition 9 open the extended tube a and the narrow tubesf which ex tend downward in the tubes (1 to a certain distance below the bottom of the latter. The water of the forward tube 0 rises in the trough or compartment j and passes over the partition g to move down again in the tubes f The water thus brought to the bottom of the tubes 61 moves upward through the annular interval of the tubes cl and f and into the compartment 76 of the body a, whence it moves down through the tube 6 and into the boiler part b to rise againthrough the tube 0.

The modified forms hereinbefore described are not the only ones in which the features of this invention can be embodied, for it will be evident that the number of the tubes, the way in which they are grouped, and their peculiar arrangements can be modified without changing the essential operation of the boiler, characterized by the separation, by means of partitions in the upper body part, of the currents of water moving upward from the two groups of tubes heated to a greater exteuttoward the two groups of tubes heated to a less extent.

In the several forms of boiler hereinbefore described the steam, moving upward around the partition gor g or g can carryalong with ita part of the water of compartment 70, which falls back into compartment but the said steam can never move upward through the currents of water which pass into the compartment j, and consequently it can neither interfere with nor hold back the said currents.

I claim- 1. Asteam-boilercomprising an upper body part, one or more boiler parts, and tubes between the said members, in combination with a partition in the shape of a trough placed longitudinally in the upper body part, and transverse partitions located at the ends of the trough, whereby are formed two compartments each of which communicates upward with the steam-chamber of the boiler and downward with one or more tubes highly heated and with one or more tubes heated to a less extent.

2. Asteam-boilercomprisingan upperbody, a lower body separate therefrom, a troughshaped longitudinal partition in the upper body, transverse partitions at the ends of the trough forming compartments in the upper body, and tubes connecting the lower body with the front and back ends of the two compartments formed by the said partitions in the upper body.

3. Asteam-boilercomprising an upper body, a lower boiler separate therefrom, a trough shaped longitudinal partition in the upper body, transverse'par-titions at the ends of the trough forming compartments in the upper body, a tube forming a communication between the lower body and theupper portion of the upper body, and a tube extending from the lower portion of the upper body down -wardly'into the lower boiler.

4. Asteam-boiler comprising an upper body, a lower boiler separate therefrom, a troughshaped longitudinal partition in the upper body, transverse partitions at the ends of the trough forming compartments in the upper body, .a tube forming a communication between the lower body and the upper portion of the upper body, and atube extending from the lower portion of the upper body downwardly into the lowerbody, and water con 

